The 2018 Jeep Grand Cherokee is a popular SUV known for its strong engines and off-road ability. But when it comes to checking the transmission fluid, many owners get confused. Unlike older models, the 2018 Grand Cherokee doesn’t have a traditional transmission dipstick under the hood. This can make simple maintenance feel complicated.
Knowing where the transmission dipstick is (or isn’t) can save time and help you avoid costly mistakes. Let’s break down exactly how to check your transmission fluid, what makes this model different, and what owners need to know.
Where Is The Transmission Dipstick On The 2018 Grand Cherokee?
Most 2018 Jeep Grand Cherokee models do not have a transmission dipstick that you can easily check from the engine bay. Instead, Jeep uses a sealed transmission system for most engine and trim options.
Why Is There No Traditional Dipstick?
- Jeep uses the 8-speed automatic (8HP70 or 850RE) transmission, which is designed to be “maintenance-free.”
- Sealed transmissions are meant to reduce user error and lower the chance of contamination.
- This means fluid checks and changes are more difficult for DIY owners.
Some older Jeep platforms like the TJ, XJ, and WK had standard dipsticks, making fluid checks easy. The WL and modern Grand Cherokees, including 2018, use a different design.
How To Check Transmission Fluid In A 2018 Jeep Grand Cherokee
You can still check or fill the transmission, but the process is different from older models.
Steps For Checking Transmission Fluid
- Warm up the engine until it reaches normal operating temperature.
- Park the vehicle on a level surface and keep the engine running.
- Lift the vehicle safely (a lift or jack stands are required).
- Locate the transmission fluid fill plug on the side of the transmission pan.
- Remove the fill plug carefully. Fluid should be level with the bottom of the fill hole.
- If fluid trickles out, the level is correct. If not, more fluid may be needed.
Important: There is no dipstick tube in the engine bay. All checks are done from underneath the vehicle.
Transmission Specifications By Engine And Trim
The 2018 Grand Cherokee came with several engines and transmission types. Here’s a summary:
| Engine | Transmission | Fluid Type | Fluid Capacity |
|---|---|---|---|
| 3.6L V6 | 850RE 8-speed auto | Mopar 8&9 Speed ATF | 8.4 quarts |
| 5.7L V8 | 8HP70 8-speed auto | Mopar 8&9 Speed ATF | 8.4 quarts |
| 6.4L V8 (SRT) | 8HP70 8-speed auto | Mopar 8&9 Speed ATF | 8.4 quarts |
| 6.2L V8 (Trackhawk) | 8HP95 8-speed auto | Mopar 8&9 Speed ATF | 8.4 quarts |
| 3.0L EcoDiesel | 8HP70 8-speed auto | Mopar 8&9 Speed ATF | 8.4 quarts |
All 2018 Grand Cherokees use a sealed automatic transmission. No engine or trim has a traditional dipstick.
Symptoms Of Low Transmission Fluid
Since the dipstick isn’t easily accessible, owners should watch for these signs:
- Delayed shifting or rough gear changes
- Slipping gears or hesitation
- Unusual noises (whining or clunking)
- Transmission overheating warning light
- Fluid leaks under the vehicle
If you notice any of these, it’s best to have your Jeep checked by a professional.
Causes Of Transmission Fluid Loss
The 2018 Grand Cherokee rarely loses fluid unless there’s a leak or mechanical issue. Common causes include:
- Worn seals or gaskets
- Loose transmission pan bolts
- Damaged transmission cooler lines
- Accident damage
Since the system is sealed, losing fluid usually means something is wrong.
When To Visit A Mechanic
Checking or refilling the transmission fluid in a 2018 Grand Cherokee requires special tools and knowledge. Here’s when you should go to a mechanic:
- Fluid level is low and you can’t find the cause
- You see major leaks under your Jeep
- Transmission shifts roughly even after adding fluid
- You lack tools to safely lift the vehicle
A certified shop can use a scan tool to read transmission temperature and ensure the fluid is at the correct level.
Estimated Cost For Fluid Service
Transmission fluid service on a 2018 Grand Cherokee is more expensive than older models because of the sealed system.
- Dealership service: $250–$450
- Independent shop: $150–$300
DIY is possible if you have the right tools, but the job is more difficult compared to Jeeps with a dipstick.
What If You Want To Add A Dipstick?
Some Jeep owners ask about adding an aftermarket dipstick kit. While kits exist, installing them can void your warranty and may not work as expected.
Before considering this, consult your dealer or a trusted mechanic. Using the wrong dipstick can lead to overfilling or running low, risking transmission damage.
Comparison: 2018 Grand Cherokee Vs Older Jeep Platforms
Here’s how the 2018 Grand Cherokee transmission access compares to other Jeep models:
| Model | Transmission Dipstick | DIY Friendly? |
|---|---|---|
| TJ (1997-2006) | Yes | High |
| XJ (1984-2001) | Yes | High |
| WK (2005-2010) | Yes | Medium |
| WL (2021+) | No | Low |
| WK2 (2011-2021) | No (sealed) | Low |
Insight: Modern Grand Cherokees (WK2 and WL) are sealed, requiring more work for fluid checks. Classic models are much easier for DIY maintenance.
Practical Tips For Jeep Owners
- Always use Mopar 8&9 Speed ATF fluid for correct operation.
- Do not open the transmission fill plug unless you have the proper tools and experience.
- Regularly inspect for leaks, especially if you tow heavy loads.
- If your Jeep is under warranty, let the dealer handle transmission service.
Frequently Asked Questions
Where Exactly Is The 2018 Grand Cherokee Transmission Dipstick?
There is no traditional dipstick. To check fluid, you must access the fill plug on the side of the transmission pan from underneath the vehicle.
What Fluid Does The 2018 Grand Cherokee Use?
The correct fluid is Mopar 8&9 Speed ATF for all engine options in 2018 models.
How Often Should I Change The Transmission Fluid?
Jeep recommends checking at 100,000 miles, but heavy use may require more frequent service. Always follow your owner’s manual.
Can I Add A Dipstick Myself?
Aftermarket kits exist, but using them may void your warranty and can lead to incorrect fluid levels. Only consider this if you’re experienced.
Is It Safe To Drive With Low Transmission Fluid?
No. Low fluid can cause slipping, overheating, and permanent transmission damage. Get leaks fixed quickly by a professional.
The 2018 Jeep Grand Cherokee’s sealed transmission design means there’s no dipstick under the hood. Always check fluid from underneath, and when in doubt, seek expert help. For more technical details, see the official Jeep owner’s site.
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